In Minecraft, time is exactly 72 times faster than normal time. This can be easily calculated as the proportion 1440⁄20 = 72, since there are 1440 minutes in a real day (60min × 24hr) and 20 minutes in a full Minecraft day. A collection of time unit conversions is listed below:

When a player first spawns in singleplayer, the day-night cycle will always start at the beginning of the daytime (0:00). Most multiplayerservers also start at the beginning of daytime, but the day-night cycle continues regardless of any new players joining.

During the daytime, the Sun rises up to its zenith in a light blue sky. The exact color of the sky depends on the current biome; for example desert skies are a lighter shade of blue than plains skies.

At approximately noon, all blocks that are in direct vertical view of the sky receive sunlight at light level 15, which is the maximum. Sunlight provides ample light for the growth of saplings, grass blocks and crops. Most undead mobs (including zombies and skeletons) exposed to direct sunlight (and are not in shade, in water, or wearing helmets) will be set on fire. Additionally, sunlight will render spiders neutral, unless they are currently chasing the player, and any endermen exposed to sunlight will teleport randomly when near the player and become neutral if already aggressive.

Sunset is the period between daytime and nighttime, and always lasts 1 1⁄2 minutes.

During sunset, the Sun descends on the western horizon, and the Moon rises on the eastern horizon. The sky near the setting Sun glows a vibrant orange-red. The Sun will also grow visibly larger as it sets.

The light level of all blocks that are in direct vertical view of the sky, and are not lit by other light sources, decreases by 1 every 10 seconds.

Between dusk and dawn, players may sleep in a bed. In singleplayer mode, doing so will advance the day-night cycle to dawn and set the weather to clear. This will also occur in multiplayer, so long as every player online is in a bed simultaneously. Time does not pass with regards to other aspects of the world, however; for example, crops will not grow faster, and furnaces will not cook food faster.

During the night, the Moon rises to its zenith in a dark blue sky dotted with small white stars. The stars appear to move with the Moon, and can be first seen towards the end of the sunset.

During nighttime, the world is covered in darkness; the light level falls to a minimum of 4, which allows hostile mobs to spawn on the surface. The exact duration for which hostile mobs are able to spawn in exposed areas is 9625 ticks. Regardless of the low light level, crops will continue to grow during the night, unless the player skips the night with the use of a bed.

Sunrise is the period between nighttime and daytime, and always lasts 1 1⁄2 minutes.

During sunrise, the Moon sets on the western horizon and the Sun rises on the eastern horizon. The sky near the rising Sun will glow a vibrant orange. The sun will also appear visibly larger as it rises, but will slowly shrink to its 8x8 pixel size while rising.

All blocks that are in direct vertical view of the sky will grow 1 light level brighter every 10 seconds. Eventually, the effects of sunlight will return, dissipating the threat of most hostile mobs.

Morning twilight begins after 22009 ticks, which is the equivalent of 4:00:32 in real time. The exact last time hostile mobs can spawn in exposed areas is 22812 (04:48:43) on clear mornings and 23031 (05:01:08) on rainy mornings.[note 1]

Clocks allow players to determine Minecraft time. They are useful underground where the current day/night cycle is not visible. They help the player avoid mistakenly surfacing at night and falling prey to night-spawned mobs on the surface.

If commands are enabled, then it is possible to change the current time with the /time commands, as detailed below. To enable or disable the day-night cycle, use the following command: /gamerule doDaylightCycle [true/false]

Each day that progresses adds 24000 ticks to the time counter. While each day looks the same, the Moon will go through one of its 8 different phases each night. Although there is no explicit command to change the Moon's phase, using /time add 24000 will advance the Moon to its next phase. Furthermore, any of the phases can be accessed with the use of one of the following commands:

Notch mentioned on his Twitter that the Sun actually rose in the north in Minecraft.[3] This was a bug and was fixed in Beta 1.9 prerelease 4, so the Sun and Moon now both rise in the east;[4] this also changed the South-West rule to the South-East rule.

Using NBT editors, the largest time value that can be set is 9223372036854775807 (2^63 - 1). After this point, the day/night cycle cannot progress. At this time, 384307168202282 days will have elapsed, or roughly 1.05 trillion years.

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